The cyanate ion, NCO-, has the least electronegative atom (carbon) in the center. The very unstable fulminate ion, CNO-, has the same formula, but the nitrogen atom is in the center. a. Draw the three possible resonance structures of CNO-. b. Which of the structures in part (a) is most favored? c. Mercury fulminate is so unstable it is used in blasting caps. Can you offer an explanation for this instability?